College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 50

A very large nonconducting plate lying in the xy plane carries a charge per unit area of s. A second such plate located at z = 2.00 cm and oriented parallel to the xy -plane carries a charge per unit area of 2 . Find the electric field (a) for z 0, (b) 0 z 2.00 cm, and (c) z 2.00 cm.